A Woman Who Just Returned from a Trip to Southeast $\times$

A woman who just returned from a trip to Southeast Asia has signs of biliary obstruction, which is confirmed by CT scan. Due to her recent travel history, the physician orders an ova and parasites examination before considering surgical intervention. The following element is found in her fecal sample at 400 $\times$ . The most likely identity of this organism is

A) Schistosoma mansoni.
B) Clonorchis sinensis.
C) Fasciola hepatica.
D) Heterophyes heterophyes.